So I bought a 1970s vintage H14 last year just to try it out after sailing dinghies for a few years and, of course, I'm totally hooked. The boat is in pretty decent condition for its age and I'm not interested in racing, just casual sailing around the lake.
Sorry to add another delamination question to the board, I tried to find other relevant posts, but this problem seems different.
The boat has a soft spot about 1 foot square on the nonslip tread in front of the trampoline. I can flex the spot about 1/2 inch. I followed the advice on the board bought the marine epoxy filler and drilled holes about 1/2 inch deep which is where I seem to hit the underside of the foam sandwich.
What seems strange is that as I look at the sandwich all 3 layers (top fiberglass, bottom fiberglass and white foam core) still seem to be laminated together and they all seem to be moving when the soft spot is flexed.
Also, when I flex the soft spot, it sinks below what would appear to be the normal faired shape of the hull and then contacts something which sounds like a more brittle foam below.
Could there be a delamination of the whole fiberglass sandwich with some type of interior core material?
What does the cross section of a hull look like?
Can the gap be filled by drilling all the way through the interior fiberglass and injecting epoxy into the interior of the hull?
Thanks for any advice (and for all the useful info already posted!)